Last semester, when I was writing my undergraduate thesis, my advisor made a huge fuss about me using the word "towards." She thought it was quite funny I had made up this spelling and made me do a search-and-replace to rid my thesis of it. At the time I was a bit miffed, but figured she knew better than me. Now I'm thinking it might just be some prescriptivist bs.
A Google search says that most believe the difference is between British and American English, with the interesting twist that "towards" is supposed to be the British one. I was born and raised in Arkansas, and while I think I would say either one, writing my thesis showed I tend to only write "towards."
So, in your dialect, is there a difference between the two words? If not, do you only use one exclusively?